Hydroxypropyl methylcellulose (HPMC) is a synthetic, water-soluble polymer that is used in a variety of applications. It is a type of cellulose ether, which means that it is derived from cellulose, the main structural component of plant cell walls. HPMC is commonly used as a thickening agent, stabilizer, and emulsifier in a range of products, including pharmaceuticals, food and beverages, personal care products, and construction materials.
. This is achieved by mixing the dried particles with a blend of surface modifiers, such as ethylene-vinyl acetate copolymer or vinyl acetate-ethylene copolymer, under high shear conditions. The coating process ensures that the polymer particles remain separate and do not agglomerate during storage, thereby maintaining their redispersibility.